TiO2 Surface Treatment Effects by Mg2+, Ba2+, and Al3+ on Sb2S3 Extremely Thin Absorber Solar Cells

Sb2S3-based extremely thin absorber (ETA) solar cells of structure, , was fabricated with porous TiO2 surface treating by Mg2+, Ba2+, and Al3+ to be full-inorganic printed solar cells. The fabrication parameters of the ETA structure were optimized and the photovoltaic characteristics were improved significantly when double treatment in Mg2+ and Ba2+ were introduced. Best cells obtained using double treatment in Mg2+ and Ba2+ attained a short-circuit photocurrent of 13.4 mA/cm(2), a open-circuit voltage of 0.584 V, a fill factor of 0.525, and a conversion efficiency 4.10% at 1 sun irradiation.